Molding apparatus



w. E. IIEISQIII.

MOLDING APPARATUS.

APPLICATION FILED M1649. 1920.

W. E. NELSON.

MOLDING APPARATUS.

APPLICATION FILED AUG. 19| 1920. p., Ptentd Oct. 3L i922. 3 SHEETS-SHE 2 wm w N MW im W. E., NELSON. MOLDIJG APPARATUS.

APPLICATION FILED Aue.19. 1920.

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3 SHEETS-SHEET 3. A

Patented et.. 3l. 1922.

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WILLIAM E. NELSON, QF SAN ANTONIO, TEXAS.

NLOLDI'NG APPARATUS.

Application tiled` August 19, 1920. Serial No. 404,520.

To @Hallein 'it may concern.'

Be it lrnown that l, lllrLLrAn E. NELSON, a citizeny of the United States, residing at San Antonio, in the county olf Bexar and. State oft Texas, have invented certain ne v and useful lmpro'veme-nts` in Molding Apparatus; and l do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to malte and use the same.`

rl`his invention relates generally to mold ing api'iaratus, and particularly to molds tor forming precast concrete units used for constructing monolithic straight and curvedwalls7 floors, ceilings and other building strimtures. i

(lne object ol: the invention is to form a mold in which a plurality7 ot units ma7 be molded simultaneously, the mold being' so constructedthat the various parts may be quickly," and easily assembled and disassembled, the latter operation being necessary when ren'ioving the hardened units from it.

Another object oigthe inx'fentionis to pro vide a mold of this character with means whereby it may be moved from one position the invention consists oli the novel Afeatures ot' construction, and the combination and arrangement ot partsas are hereinafter fully described and claimed.

The descriptive matter ot the application is supplemented by the accompanying drawings forming a part thercolE and in which:

l Figure l is plan Vview ot' ainold constructed in accordance with ythe invention, a Alew of the units formed b v the mold being' shown in the mold;

Fig. 2 is a longitudinal sectional view otV the `mold taken substantially on the line Q-Q of Fig. l;

Fig. 3 is a transverse sectional view ot the mold talren substantially on the line of Fig. l;

Fig. l is a perspective view ot' a pair ot cooperating or complemental mol-d elements;

Fig. 5 is a side elevation of another form ot' mold element;

Fig. G is an edge View of this other form of mold element;

Fig. T is a transverse sectional view taken on the line 7--7 of Fig. 5;

Fig. 8 is a iront view, partlyT broken away and in set-tion, ot the type ot 'unit formed in the mold and adapted to be used for constructing straight walls;

iF ig. 9 is an edge view of this forni of unit;

Fig. l() is a 'transverse sectional view of a portion of the mold, illustrating the man ner in which detachable filler members are used in adapting the mold to form units used for constructing curved walls;

Fig. ll is a perspective view of a pair et detachable filler members;

Fig. l2' is a plan or edge view of several curved wall units formed in the mold bv using the filler members shown in Fig. ll.;

Fig. 13 is a transverse sectional view of a portiono'tv the mold, illustrating` the manner in which additional detachable ller members are used when making units designed for floors or the like; i

Fig. 14 is a. perspective view of one ot the last mentioned filler members;

Fig. 'l5 is a similar view of another o'l the last mentioned' filler members; and

Fig. 1.6 is a transverse sectional view ot a portion ot a floor, constructed of units made in the mold' when using the liller memberssho-wn in Figs. 14 and l5.

ln the embodiment illustrated the numeral l designates the bottom ot the mold, which is pretcrablwT in the form ot a large flat rectangular shaped sheet metal plate reinfor-ced at its lower sidevadjacent its tour edges with structural angles 2 and having` depending from its lower side adjacent its ends, pairs of standards 3 provided at their lower end with bearings in which the axles e of wheels 5 are mounted. The mold is thus mounted on a carriage so that it may be easily moved from one position to another, the wheels preferably running ugon rails 6.

Arranged at one end edge of the bottom 1 is an upright ledge 7, which is preferably in the form of a structural angle bar. This angle bar has one of its sides resting `flat upon the bottom 1 and permanently secured thereto by means of bolts 8,

One of the side or longitudinal edges of the bottom 1 is similarly provided with an upright ledge 9 formed of a structural angle bar having one of its sides resting flat upon the bottom 1 and permanently secured by means of bolts 10.

The other end edge and other side or longitudinal edge of the bottom 1 are provided with upright ledges 11 and 12 respectively, which, like the ledges 7 and 9 are in the form of anglel bars, but these ledges 11 and 12 are not permanently secured to the bottom 1. They are detachably fastened to the bottom. The means for doing this consists of bolts 13 carried by the ledges and provided on their free ends with wing nuts 14. The bolts 13 extend through slots 15 formed in the last. mentioned edges of the bottom 1. By this construction the ledges 11 and 12 may be disconnected and removed from the bottom 1 by looseningthe nuts 14 so as to allow the ledges to be removed, the bolts 13 sliding out of the slots 15 which permits this to be done. f

The bottom or platform 1 and the ledges 7, 9, 11 and 12 constitute a rectangular shaped support for a rectangular-shaped set of interlocked mold members. This set includes spaced parallel mold members which extend transversely across the support be tween the ledges 9 and 12 and which rest upon the bottom 1. These members consist of long sheet metal bars 16 which are bent circularly in cross section and have their edges flatand in alinement with one another so that they are provided with longitudinal bulges 17 on one of their sides and disposed between the upper and lower edge-s thereof. The flanges 18, or the upper and lower edges of the bars 16 are provided with notches 19, the purpose of which is hereinafter described. One of these bars 16 is positioned alongside the ledge 7 with its flanges 18 bearing fiat against the inner side of the ledge. Another of the: bars 16 is similarly positioned alongside of the ledge 11. The bulges 17 of these two bars 16 are disposed and extend inwardly. Between the ends of the support a number of intermediate mold members are disposed. Each of these intermediate mold members is constructed from a pair of the bars 16. Arranged so that the flanges 18 of. one bar bears Hat against those of the other bar and so that the bulges 17 extend in opposite directions. One of the bars 16 is thus the complement of the other bar 16 to form the complete mold member.

ln order to divide the mold transversely a number of longitudinally extending spa-ced parallel mold members are used. These longitudinal mold members are constructed somewhat similar to the transverse members, but different therefrom principally because they are considerably shorter. One of these longitudinally extending mold members is shown in Figs. 5, 6 and 7 and from these views it will be seen that it consists of a bar 2O provided with. a longitudinallT7 extending bulged portion 21 and has its upper and lower edges flat and alined with one another so as to form flanges 22. As clearly shown in F 6, the ends of the bar 2O are out off obliquely. A number of the bars 2() are placed alongside the ledges 9 and 12 with their flanges 22 resting fiat against the ledges and with their bulges 21 extending inwardly. The intermediate longitudinally extending mold members are formed of two of the bars 20 positioned so that the flanges 22 of one bar rest flat against those of the other bar and so that the bulges 21 extend in opposite directions. The proj ecting ends of the flanges 22 extend into the notches 19 formed in the bars 16 so that the bars 20 are locked relatively to the bars 16. The purpose of having the ends of the bars 2O cut olf obliquely is to allow them to fit against or properly receive the bulges 17 of the bars 16.

In setting up the mold, assuming that the ledges 11 and 12 have been disconnected from the notches in the bottom 1 and that none of the mold members are inv place upon the bottom, one of the bars 16 is first placed along the ledge 7 A. number of the bars 20 are then placed at right angles to this first bar 16 with their ends interlocked therewith, one of the outermost bars 20 being placed alongside the ledge 9. The intermediate mold members are each formed of two bars 20. After the rst series of bars 2() are in place, the next transverse mold member is put in place, and the assembling is carried out in a similar manner through the entire length ofthe mold. After this has been done, the ledges 11 and 12 are placed upon the bottom 1, and locked thereto by means of the bolts 18 and wing-nuts 14;, the bolts 13 being slid into the notches 15 as the ledges 11 and 12 are moved to their rproper position.

With a complete mold assembled, concrete is placed therein, leveled flush with the upper edges of the ledges and the various mold members by means of a trowel or in any other convenient manner.` and the mold is then moved to a place where it may be. allowed to stand for a time sufficient to perA mit the concrete to set. Then it is desired to remove the hardened concrete units from the mold, the ledges 11 and 12 are removed and the mold members are also removed in order to free the units.

Figs. 8 and 9 represent. the construction in addition thereto, the ends of the bars forming the longitudinal mold members being out voil obliquely to adapt them to iit around the bulges et the transverse mold members. A structure as specified in elaiin l together with the bars forming the transverse mold members being provided with notches at their upper and lower edges to receive 'the upper and lower edges or' the ends of the bars forming the longitudinal mold members.

Li. A mold comprising a rectangular platform, upstanding ledges arranged at the four edges oia said platform, longitudinally and transversely extending mold members resting upon said platform and Confined between said ledges? said mold members. being formed from bars provided with longitudi nal bnlges and fiat Aflanges at tieir upper and lower edges'7 said lianges being alined, and iiller members resting upon the platlform and bearing against the iianges at the lower edges osaid mold members.

5. ln a multiple concrete unit-molding ap- ,paiatus7 a reetangularnshaped set of interloolred mold members for disposition in a i'eetangular-shaped supper@ said setv comprising a plurality of relatively long members arranged in spaced parallel relation and plurality of relatively short members arranged between and yat right angles to the relatively long members and in spaced parallel relation, the outermost relatively long members and the outermost relatively short members being respectively in the form of relatively long and relatively short bars having ilanges at their upper and lower edges and longitudinally extending bulges on their inner sides between their flanges,

and the intermediate. relatively long mem- WILLIAM E. NELSON. y 

